arg.h

/*
 * From http://git.suckless.org/sbase/plain/arg.h
 *
 * Copy me if you can.
 * by 20h
 */

#pragma once

char *argv0;

/* use main(int argc, char *argv[]) */
#define ARGBEGIN        for (argv0 = *argv, argv++, argc--;\
                                        argv[0] && argv[0][1]\
                                        && argv[0][0] == '-';\
                                        argc--, argv++) {\
                                char argc_;\
                                char **argv_;\
                                int brk_;\
                                if (argv[0][1] == '-' && argv[0][2] == '\0') {\
                                        argv++;\
                                        argc--;\
                                        break;\
                                }\
                                for (brk_ = 0, argv[0]++, argv_ = argv;\
                                                argv[0][0] && !brk_;\
                                                argv[0]++) {\
                                        if (argv_ != argv)\
                                                break;\
                                        argc_ = argv[0][0];\
                                        switch (argc_)

/* Handles obsolete -NUM syntax */
#define ARGNUM                          case '0':\
                                        case '1':\
                                        case '2':\
                                        case '3':\
                                        case '4':\
                                        case '5':\
                                        case '6':\
                                        case '7':\
                                        case '8':\
                                        case '9'

#define ARGEND                  }\
                        }

#define ARGC()          argc_

#define ARGNUMF()       (brk_ = 1, estrtonum(argv[0], 0, INT_MAX))

#define EARGF(x)        ((argv[0][1] == '\0' && argv[1] == NULL)?\
                                ((x), abort(), (char *)0) :\
                                (brk_ = 1, (argv[0][1] != '\0')?\
                                        (&argv[0][1]) :\
                                        (argc--, argv++, argv[0])))

#define ARGF()          ((argv[0][1] == '\0' && argv[1] == NULL)?\
                                (char *)0 :\
                                (brk_ = 1, (argv[0][1] != '\0')?\
                                        (&argv[0][1]) :\
                                        (argc--, argv++, argv[0])))

#define LNGARG()        &argv[0][0]